Domestic sewage heat energy recovery device

Abstract

The utility model relates to a domestic sewage heat energy recovery device. Comprising a maintenance installation frame, a first heat exchange assembly and a second heat exchange assembly which are communicated with each other are installed on the maintenance installation frame, a medium input pipe is connected to the first heat exchange assembly, and an after-filtration conveying pipe and a water pump are connected between the filtering assembly and the first heat exchange assembly in a communicated mode; the filtering assembly comprises a filtering barrel, and a filtering barrel cover is mounted at the top of the filtering barrel; a filter barrel water inlet and a filter barrel water outlet are formed in the filter barrel, and a partition plate structure is arranged in an inner cavity of the filter barrel and divides the inner cavity of the filter barrel into a sewage cavity and a purified water cavity; the sewage cavity is communicated with the water inlet of the filter barrel, the clean water cavity is communicated with the water outlet of the filter barrel, and a blow-off pipe and a blow-off port are arranged at the bottom of the filter barrel; a through groove is formed in the bottom of the partition plate structure, a filter screen cylinder installed in the water purification cavity is arranged, the cleaning brush mechanism is arranged in the filter screen cylinder, and the cleaning motor is further included. According to the utility model, primary heat exchange and secondary heat exchange can be carried out on sewage, so that efficient heat recovery operation is realized; sewage can be filtered before heat exchange operation, and a filter part can be automatically cleaned at regular intervals.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater resource recycling technology, and in particular relates to a domestic sewage heat energy recovery device. Background Technology

[0002] Domestic sewage is wastewater discharged from daily life by residents, mainly originating from residential and public buildings such as homes, government offices, schools, hospitals, shops, public places, and industrial enterprise restrooms. This wastewater contains a large amount of usable heat energy, which can be used as a heat source for heat pumps to recover a significant amount of heat energy from urban sewage. More importantly, it saves energy and reduces consumption. This technology is achieved through a sewage source heat pump system.

[0003] Wastewater heat exchange equipment is a front-end product in wastewater source heat pump systems. It is primarily used in winter to extract low-grade heat energy dispersed in urban raw sewage and industrial wastewater, transferring it to the heat pump unit via intermediate water to heat buildings. In summer, it transfers heat from the building to the wastewater for cooling. This technology offers an excellent option for energy conservation and emission reduction. Existing wastewater heat exchange technologies require filtering solid impurities from the wastewater before heat exchange treatment to prevent blockages caused by impurities in the equipment.

[0004] In actual operation, when sewage containing solid impurities passes through a filter screen, the solid impurities can be trapped by the filter screen, achieving solid-liquid separation. However, in current sewage filtration devices, the filter screens are mostly fixed. After long-term sewage treatment, solid impurities will clog the filter screen in the direction facing the inlet water, causing solid-liquid separation to fail and reducing sewage treatment efficiency. Regular manual cleaning is required, which increases the workload of workers and is time-consuming. Therefore, there is an urgent need to design a domestic sewage heat recovery device to solve the above problems. Utility Model Content

[0005] This invention provides a domestic sewage heat recovery device with a reasonable structural design to solve the technical problems existing in the prior art. This invention can perform primary and secondary heat exchange on sewage, thereby achieving efficient heat recovery; it can also filter the sewage before heat exchange and periodically perform self-cleaning on the filter elements.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A domestic sewage heat energy recovery device includes a maintenance and installation frame, on which a heat exchange component one and a heat exchange component two are installed in communication. A medium input pipe connected to the heat exchange component one and communicating with a liquid heat exchange medium is connected. It also includes a filter component for filtering sewage. A filtered conveying pipe and a water pump are connected between the filter component and the heat exchange component one. The filter component includes a filter bucket with multiple sets of filter bucket legs fixed to its bottom, and a filter bucket cover installed at the open top of the filter bucket. The filter bucket is equipped with a filter bucket inlet and a filter bucket outlet positioned opposite each other. A partition structure is installed inside the filter bucket, dividing its interior into a wastewater chamber and a clean water chamber. The wastewater chamber is connected to the filter bucket inlet, and the clean water chamber is connected to the filter bucket outlet. A drain pipe and drain outlet connected to the wastewater chamber are located at the bottom of the filter bucket. A through groove is formed at the bottom of the partition structure, and a filter screen cylinder installed in the clean water chamber is located in the through groove. The filter bucket also includes a cleaning brush mechanism installed inside the filter screen cylinder for cleaning, and a cleaning motor installed on the filter bucket cover to drive the cleaning brush mechanism to rotate.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a domestic sewage heat energy recovery device. By setting up a heat exchange component one and a heat exchange component two connected in series, the wastewater can undergo primary and secondary heat exchange, thereby achieving high-efficiency heat exchange and ultimately realizing efficient heat recovery. The set filter component can filter the sewage before the heat exchange operation, avoiding impurities from clogging the heat exchange components one and two. The set cleaning brush mechanism and the cleaning motor that drives the cleaning brush mechanism can periodically clean the filter screen in the filter component, thereby effectively keeping the filter screen clean and eliminating the need for staff to manually clean the filter screen regularly, reducing the need for manual maintenance.

[0008] Preferably, the cleaning brush mechanism includes a hollow mounting frame installed in a through groove at the bottom of the partition structure, a cleaning shaft rotatably connected to the hollow mounting frame and arranged longitudinally at the center of the hollow mounting frame, the cleaning shaft being rotatably connected to the filter barrel cover and connected to the cleaning motor; a cleaning mounting frame is fixedly connected to the cleaning shaft, and several cleaning wire brushes are installed on the cleaning mounting frame for cleaning the filter cylinder.

[0009] Preferably, the baffle structure includes an arc-shaped guide plate fixedly connected to the inner cavity of the filter barrel adjacent to the filter barrel inlet, an upper baffle plate fixedly connected to the top of the arc-shaped guide plate, the upper baffle plate being located above the filter barrel inlet and fixedly connected to the inner wall of the filter barrel; it also includes a lower baffle plate fixedly connected to the bottom of the arc-shaped guide plate, the lower baffle plate being located below the filter barrel outlet and fixedly connected to the inner wall of the filter barrel; a through groove is provided on the lower baffle plate for installing a cleaning brush mechanism.

[0010] Preferably, the filter assembly further includes multiple sets of filter barrel supports that are fixedly connected to the inner wall of the filter barrel in the water purification chamber. Each filter barrel support includes an arc-shaped rod that fits against the outer wall of the filter screen cylinder, and straight rods that are integrally formed at both ends of the arc-shaped rod and fixedly connected to the inner wall of the filter barrel.

[0011] Preferably, the heat exchange assembly includes a heat exchange tube shell with open ends. An inlet and a outlet are fixedly connected to the outer wall of the heat exchange tube shell and communicate with its inner cavity. The inlet is connected to the outlet of the filtered delivery pipe. A rear end cover and a front chamber cylinder are respectively installed at the open ends of the heat exchange tube shell. A partition plate is fixedly connected inside the front chamber cylinder to divide its inner cavity into upper and lower chambers. A heat pipe mechanism connected to the upper and lower chambers of the front chamber cylinder is installed inside the heat exchange tube shell. A medium inlet connected to the upper chamber and a medium outlet connected to the lower chamber are fixedly connected to the front chamber cylinder. The medium inlet is connected to the medium input pipe.

[0012] Preferably, the heat exchange assembly 2 includes a heat exchange shell body, with a water inlet 2 connected to the drain outlet 1 at the top of the heat exchange shell body and a drain outlet 2 at the bottom of the heat exchange shell body; the front end of the heat exchange shell body is open and connected to a front tube box 2, and a partition plate 2 is fixedly connected inside the front tube box 2 to divide its inner cavity into upper and lower chambers; a heat pipe mechanism 2 connected to the upper and lower chambers of the front tube box 2 is installed inside the heat exchange shell body; a medium inlet 2 connected to the upper chamber and a medium outlet 2 connected to the lower chamber are fixedly connected to the front tube box 2, and the medium inlet 2 is connected to the medium outlet 1.

[0013] Preferably: Heat pipe mechanism one includes a heat pipe plate one disposed on the mating surface of the heat exchange tube shell and the front chamber cylinder, and a heat pipe plate one disposed on the mating surface of the heat exchange tube shell and the rear end cover. Several heat exchange tubes one are installed through the two heat pipe plates one. The several heat exchange tubes one are divided into upper and lower unit parts, and the outlets of the several heat exchange tubes one in the two unit parts are connected in the inner cavity of the rear end cover. The inlet of the several heat exchange tubes one in the upper unit part is connected to the upper chamber of the front chamber cylinder, and the inlet of the several heat exchange tubes one in the lower unit part is connected to the lower chamber of the front chamber cylinder. Heat pipe mechanism two includes a heat pipe plate two installed at the mating point of the heat exchange shell body and the front tube box two. Several heat exchange tubes two with a U-shaped structure are installed through the heat pipe plate two. The upper inlet of each heat exchange tube two is connected to the upper chamber of the front tube box two, and the lower outlet of each heat exchange tube two is connected to the lower chamber of the front tube box two. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the filter component in this utility model;

[0016] Figure 3 This is a cross-sectional structural diagram of heat exchange component one and heat exchange component two in this utility model.

[0017] In the diagram: 1. Filter assembly; 1-1. Filter canister support leg; 1-2. Drain pipe; 1-3. Drain outlet; 1-4. Filter canister; 1-5. Filter canister inlet; 1-6. Upper partition; 1-7. Filter canister cover; 1-8. Cleaning motor; 1-9. Flushing pipe; 1-10. Filter canister outlet; 1-11. Cleaning wire brush; 1-12. Filter canister support; 1-13. Filter screen cylinder; 1-14. Cleaning mounting bracket; 1-15. Cleaning shaft; 1-16. Hollowed-out mounting bracket; 1-17. Lower partition; 1-18. Arc-shaped guide plate; 2. Heat exchange assembly one; 2-1. Rear end cover; 2-2. Inlet one; 2-3. Heat exchanger shell; 2-4. Heat exchanger tube one; 2-5. Heat pipe plate one; 2-6. Drain outlet one; 2-7. Divider plate one; 2-8. Medium inlet one; 2-9. Medium outlet one; 2-10. Front chamber cylinder; 3. Filter delivery pipe; 4. Heat exchanger assembly two; 4-1. Drain outlet two; 4-2. Heat exchanger shell body; 4-3. Heat exchanger tube two; 4-4. Water inlet two; 4-5. Heat pipe plate two; 4-6. Medium inlet two; 4-7. Divider plate two; 4-8. Front tube box two; 4-9. Medium outlet two; 5. Medium input pipe; 6. Maintenance mounting bracket; 7. Medium output pipe; 8. Ladder. Detailed Implementation

[0018] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail:

[0019] Please see Figure 1 The wastewater heat recovery device of this utility model includes a maintenance and installation frame 6, on which heat exchange component 1 2 and heat exchange component 2 4 are mounted and connected. A medium input pipe 5 connected to heat exchange component 1 2 and communicating with a liquid heat exchange medium is connected to the heat exchange component 1 2. It also includes a filter component 1 for filtering wastewater. A filtered wastewater delivery pipe 3, a valve, and a water pump are connected between filter component 1 and heat exchange component 1 2. In addition, a ladder 8 is installed on the maintenance and installation frame 6 to facilitate workers climbing onto the platform installed on the upper part of the frame 6.

[0020] like Figure 2As shown, the above-mentioned filter assembly 1 includes a filter barrel 1-4 with multiple sets of filter barrel legs 1-1 fixed to the bottom, and a filter barrel cover 1-7 installed at the top opening of the filter barrel 1-4; a filter barrel inlet 1-5 and a filter barrel outlet 1-10 are provided on the outer wall of the filter barrel 1-4 and are arranged opposite to each other; a partition structure is provided in the inner cavity of the filter barrel 1-4 to divide the inner cavity into a sewage chamber and a clean water chamber; the sewage chamber is connected to the filter barrel inlet 1-5 and the clean water chamber is connected to the filter barrel outlet 1-10; a drain pipe 1-2 and a drain outlet 1-3 connected to the sewage chamber are provided at the bottom of the filter barrel 1-4.

[0021] The aforementioned baffle structure includes an arc-shaped guide plate 1-18 fixedly connected to the inner cavity of the filter barrel 1-4 adjacent to the filter barrel inlet 1-5. An upper baffle 1-6 is fixedly connected to the top of the arc-shaped guide plate 1-18. The upper baffle 1-6 is located above the filter barrel inlet 1-5 and is fixedly connected to the inner wall of the filter barrel 1-4. The structure also includes a lower baffle 1-17 fixedly connected to the bottom of the arc-shaped guide plate 1-18. The lower baffle 1-17 is located below the filter barrel outlet 1-10 and is fixedly connected to the inner wall of the filter barrel 1-4. A through groove is provided on the lower baffle 1-17 for installing a cleaning brush mechanism.

[0022] The bottom partition 1-17 of the partition structure has a through groove and a filter screen cylinder 1-13 installed in the water purification chamber. It also includes a cleaning brush mechanism installed in the filter screen cylinder 1-13 for cleaning it, and a cleaning motor 1-8 installed on the filter cover 1-7 for driving the cleaning brush mechanism to rotate.

[0023] like Figure 2 As shown, the cleaning brush mechanism includes a perforated mounting frame 1-16 installed in a through groove at the bottom of the partition structure. A cleaning shaft 1-15, which is rotatably connected to the perforated mounting frame 1-16 and arranged longitudinally, is installed at the center of the perforated mounting frame 1-16. The cleaning shaft 1-15 is rotatably connected to the filter cover 1-7 and connected to the cleaning motor 1-8. A cleaning mounting frame 1-14 is fixedly connected to the cleaning shaft 1-15. Several cleaning wire brushes 1-11 are installed at the end of the cleaning mounting frame 1-14 for cleaning the filter cylinder 1-13.

[0024] In addition, the hollow mounting bracket 1-16 in the cleaning brush mechanism is installed in the through groove opened on the lower partition 1-17. The hollow mounting bracket 1-16 is composed of a mounting sleeve located in the middle of the through groove and several connecting plates radially distributed about the mounting sleeve. The inner end of the connecting plate is fixedly connected to the mounting sleeve, and the outer end is fixedly connected to the lower partition 1-17. The cleaning shaft 1-15 is rotatably connected to the mounting sleeve through a copper sleeve.

[0025] To further improve the cleaning effect of the filter assembly 1, the filter assembly 1 also includes a flushing port 1-9 installed on the filter cover 1-7 and connected to the inner cavity of the filter screen cylinder 1-13 for backwashing the filter screen cylinder 1-13.

[0026] In addition, the filter assembly 1 also includes multiple sets of filter tank supports 1-12 fixedly connected to the inner wall of the filter tank 1-4 in the water purification chamber. Each filter tank support 1-12 includes an arc-shaped rod that fits against the outer wall of the filter screen cylinder 1-13, and straight rods integrally formed at both ends of the arc-shaped rod that are fixedly connected to the inner wall of the filter tank 1-4. At least two sets of the filter tank supports 1-12 are provided.

[0027] In addition, a detection element for detecting the water pressure in its purification chamber is installed on the filter assembly 1. In actual operation, the heat recovery device of this utility model is electrically connected to the control system in the workshop.

[0028] like Figure 3 As shown, the heat exchange assembly 2 includes a heat exchange tube shell 2-3 with open ends. An inlet 2-2 and a drain 2-6 connected to the inner cavity of the heat exchange tube shell 2-3 are fixedly connected to the outer wall of the heat exchange tube shell 2-3. The inlet 2-2 is connected to the outlet of the filtered delivery pipe 3. A rear end cover 2-1 and a front chamber cylinder 2-10 are respectively installed at the open ends of the heat exchange tube shell 2-3. A partition plate 2-7 is fixedly connected inside the front chamber cylinder 2-10 to divide its inner cavity into upper and lower chambers. A heat pipe mechanism 1 connected to the upper and lower chambers of the front chamber cylinder 2-10 is installed inside the heat exchange tube shell 2-3. A medium inlet 2-8 connected to the upper chamber and a medium outlet 2-9 connected to the lower chamber are fixedly connected to the front chamber cylinder 2-10. The medium inlet 2-8 is connected to the medium input pipe 5.

[0029] The heat pipe mechanism includes a heat pipe plate 2-5 disposed at the mating surface of the heat exchanger shell 2-3 and the front chamber cylinder 2-10, and another heat pipe plate 2-5 disposed at the mating surface of the heat exchanger shell 2-3 and the rear end cover 2-1. A plurality of heat exchanger tubes 2-4 are installed through the heat pipe plates 2-5. The heat exchanger tubes 2-4 are divided into upper and lower units, and the outlets of the heat exchanger tubes 2-4 in the two units are connected within the inner cavity of the rear end cover 2-1. The inlets of the heat exchanger tubes 2-4 in the upper unit are connected to the upper chamber of the front chamber cylinder 2-10, and the inlets of the heat exchanger tubes 2-4 in the lower unit are connected to the lower chamber of the front chamber cylinder 2-10. The heat pipe mechanism also includes a plurality of semi-circular mounting guide plates disposed between the two heat pipe plates 2-5. Each of the mounting guide plates has perforations for the heat exchanger tubes 2-4 to pass through.

[0030] like Figure 3As shown, the aforementioned heat exchange assembly 4 includes a heat exchange shell body 4-2. A water inlet 4-4, which is connected to a drain outlet 2-6, is located at the top of the heat exchange shell body 4-2. A drain outlet 4-1 is located at the bottom of the heat exchange shell body 4-2. The front end of the heat exchange shell body 4-2 is open and connected to a front pipe box 4-8. A partition plate 4-7, which divides the inner cavity of the front pipe box 4-8 into upper and lower chambers, is fixedly installed inside the front pipe box 4-8. The heat exchange shell body 4-2 is equipped with... A heat pipe mechanism 2 is provided, which communicates with the upper and lower chambers of the front tube box 2 4-8. A medium inlet 2 4-6 communicating with the upper chamber and a medium outlet 2 4-9 communicating with the lower chamber are fixedly connected to the front tube box 2 4-8. The medium inlet 2 4-6 is connected to the medium outlet 2 2-9, meaning a medium output pipe 7 is connected between the medium outlet 2 2-9 and the medium inlet 2 4-6. Additionally, a water outlet pipe is connected to the aforementioned medium outlet 2 4-9. Furthermore, several mounting ports communicating with the inner cavity of the heat exchange shell body 4-2 are provided on the outer wall for mounting components such as pressure gauges and thermometers.

[0031] The second heat pipe mechanism includes a heat pipe plate 4-5 installed at the junction of the heat exchange shell body 4-2 and the front tube box 4-8. Several U-shaped heat exchange tubes 4-3 are installed through the heat pipe plate 4-5. The upper inlet of each heat exchange tube 4-3 is connected to the upper chamber of the front tube box 4-8, and the lower outlet of each heat exchange tube 4-3 is connected to the lower chamber of the front tube box 4-8. The second heat pipe mechanism also includes several mounting plates installed on the heat pipe plate 4-5 via connecting rods. Each mounting plate has through holes for the heat pipe plates 4-5 to pass through.

[0032] Working principle:

[0033] In actual operation, domestic wastewater enters the delivery pipeline via a water pump and then flows into the filter inlet 1-5 of the filter assembly 1. Under the guidance of the baffle structure inside the filter barrel 1-4, the wastewater enters the filter screen cylinder 1-13 through the channel at its bottom and undergoes filtration. The filtered wastewater then enters the inner cavity of the heat exchange assembly 2 and the heat exchange assembly 4 connected in series by the water pump. Simultaneously, clean water flows into the heat pipe mechanism of the heat exchange assembly 2 and the heat exchange assembly 4 connected in series by the water pump through the medium input pipe 5, thereby achieving primary and secondary heat exchange, resulting in high-efficiency heat exchange and ultimately efficient heat recovery. After completing the heat exchange, the wastewater is discharged from the drain outlet 4-1 after cooling, thus achieving the purpose of wastewater heat recovery and reuse.

[0034] During actual operation, the control system periodically activates the self-cleaning program. At this time, the cleaning motor 1-8 drives the cleaning shaft 1-15 to rotate, and the cleaning mounting bracket 1-14 on the cleaning shaft 1-15 rotates accordingly. The cleaning wire brush 1-11 installed at the end of the cleaning mounting bracket 1-14 begins to move along the inner wall of the filter cylinder 1-13, thereby removing the attached impurities. Through such mechanical movement, the filter cylinder 1-13 can be effectively kept clean, reducing the need for manual maintenance and ensuring the filtration effect of the filter cylinder 1-13. The cleaned impurities fall to the bottom of the inner cavity of the filter bucket 1-4. To facilitate the discharge of impurities, clean water can be injected into the flushing port 1-9, and the ball valve installed on the drain pipe 1-2 can be opened, so that the water flow can carry the cleaned impurities to the outside of the filter assembly 1.

Claims

1. A device for recovering heat energy from domestic sewage, characterized in that: The system includes a maintenance mounting frame (6), on which heat exchange assembly 1 (2) and heat exchange assembly 2 (4) are mounted. A medium input pipe (5) connected to the liquid heat exchange medium is connected to heat exchange assembly 1 (2). The system also includes a filter assembly (1) for filtering wastewater. A post-filter delivery pipe (3) and a water pump are connected between the filter assembly (1) and heat exchange assembly 1 (2). The filter assembly (1) includes a filter bucket (1-4) with multiple sets of filter bucket legs (1-1) fixed to the bottom. A filter bucket cover (1-7) is installed at the top opening of the filter bucket (1-4). A filter bucket inlet (1-5) and a filter bucket outlet are provided on the filter bucket (1-4) respectively. The filter barrel (1-4) has a baffle structure inside, which divides the inner cavity into a sewage chamber and a clean water chamber. The sewage chamber is connected to the filter barrel inlet (1-5), and the clean water chamber is connected to the filter barrel outlet (1-10). The bottom of the filter barrel (1-4) is provided with a drain pipe (1-2) and a drain outlet (1-3) connected to the sewage chamber. A through groove is opened at the bottom of the baffle structure, and a filter screen cylinder (1-13) is installed in the clean water chamber at the through groove. The filter screen cylinder (1-13) is also provided with a cleaning brush mechanism for cleaning it, which is provided in the filter screen cylinder (1-13). The filter barrel cover (1-7) is also provided with a cleaning motor (1-8) for driving the cleaning brush mechanism to rotate.

2. The device for recovering heat energy from domestic sewage according to claim 1, characterized in that: The cleaning brush mechanism includes a perforated mounting frame (1-16) installed in a through groove at the bottom of the partition structure. A cleaning shaft (1-15) is rotatably connected to the perforated mounting frame (1-16) and arranged longitudinally. The cleaning shaft (1-15) is rotatably connected to the filter cover (1-7) and connected to the cleaning motor (1-8). A cleaning mounting frame (1-14) is fixedly connected to the cleaning shaft (1-15). Several cleaning wire brushes (1-11) are installed on the cleaning mounting frame (1-14) for cleaning the filter cylinder (1-13).

3. The device for recovering heat energy from domestic sewage according to claim 1, characterized in that: The baffle structure includes an arc-shaped guide plate (1-18) fixedly connected to the inner cavity of the filter barrel (1-4) adjacent to the filter barrel inlet (1-5), an upper baffle plate (1-6) fixedly connected to the top of the arc-shaped guide plate (1-18), the upper baffle plate (1-6) being located above the filter barrel inlet (1-5) and fixedly connected to the inner wall of the filter barrel (1-4); it also includes a lower baffle plate (1-17) fixedly connected to the bottom of the arc-shaped guide plate (1-18), the lower baffle plate (1-17) being located below the filter barrel outlet (1-10) and fixedly connected to the inner wall of the filter barrel (1-4); a through groove is provided on the lower baffle plate (1-17) for installing a cleaning brush mechanism.

4. The device for recovering heat energy from domestic sewage according to claim 1, characterized in that: The filter assembly (1) also includes multiple sets of filter barrel supports (1-12) that are fixed to the inner wall of the filter barrel (1-4) in the water purification chamber. The filter barrel support (1-12) includes an arc-shaped rod that fits against the outer wall of the filter screen cylinder (1-13). Both ends of the arc-shaped rod are integrally formed with straight rods that are fixed to the inner wall of the filter barrel (1-4).

5. The device for recovering heat energy from domestic sewage according to claim 1, characterized in that: The heat exchange assembly (2) includes a heat exchange tube shell (2-3) with open ends. An inlet (2-2) and a drain (2-6) communicating with the inner cavity of the heat exchange tube shell (2-3) are fixedly connected to the outer wall of the heat exchange tube shell (2-3). The inlet (2-2) is connected to the outlet of the filtered delivery pipe (3). A rear end cover (2-1) and a front chamber cylinder (2-10) are respectively installed at the open ends of the heat exchange tube shell (2-3). The inner cavity is fixedly connected to a partition plate (2-7) that divides the inner cavity into two chambers, an upper and a lower chamber. A heat pipe mechanism is installed in the heat exchange tube shell (2-3) and connected to the upper and lower chambers of the front partition cylinder (2-10). A medium inlet (2-8) connected to the upper chamber and a medium outlet (2-9) connected to the lower chamber are fixedly connected to the front partition cylinder (2-10). The medium inlet (2-8) is connected to the medium input pipe (5).

6. The device for recovering heat energy from domestic sewage according to claim 5, characterized in that: The heat exchange assembly 2 (4) includes a heat exchange shell body (4-2), with an inlet 2 (4-4) at the top of the heat exchange shell body (4-2) that is connected to the drain outlet 1 (2-6), and a drain outlet 2 (4-1) at the bottom of the heat exchange shell body (4-2). The front end of the heat exchange shell body (4-2) is open and connected to a front tube box 2 (4-8). A partition plate 2 (4-7) is fixedly connected inside the front tube box 2 (4-8) to divide its inner cavity into upper and lower chambers. A heat pipe mechanism 2 is installed inside the heat exchange shell body (4-2) and communicates with the upper and lower chambers of the front tube box 2 (4-8). A medium inlet 2 (4-6) communicating with the upper chamber and a medium outlet 2 (4-9) communicating with the lower chamber are fixedly connected to the front tube box 2 (4-8). The medium inlet 2 (4-6) is connected to the medium outlet 1 (2-9).

7. The device for recovering heat energy from domestic sewage according to claim 6, characterized in that: The heat pipe mechanism includes a heat pipe plate (2-5) disposed on the mating surface of the heat exchange tube shell (2-3) and the front chamber cylinder (2-10), and a heat pipe plate (2-5) disposed on the mating surface of the heat exchange tube shell (2-3) and the rear end cover (2-1). Several heat exchange tubes (2-4) are installed through the two heat pipe plates (2-5). The heat exchange tubes (2-4) are divided into upper and lower unit sections, and the outlets of the heat exchange tubes (2-4) in the two unit sections are connected to the inner cavity of the rear end cover (2-1). The inlets of the heat exchange tubes (2-4) in the upper unit section are connected to the front chamber cylinder (2-10). The upper chamber of the -10) is connected, and the inlet of several heat exchange tubes (2-4) in the lower unit is connected to the lower chamber of the front sub-chamber (2-10); the heat pipe mechanism includes a heat pipe plate (4-5) installed at the joint of the heat exchange shell body (4-2) and the front tube box (4-8). Several heat exchange tubes (4-3) with a U-shaped structure are installed through the heat pipe plate (4-5). The upper inlet of each heat exchange tube (4-3) is connected to the upper chamber of the front tube box (4-8), and the lower outlet of each heat exchange tube (4-3) is connected to the lower chamber of the front tube box (4-8).

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